Python小工具之消耗系统指定大小内存的方法

#!/usr/bin/python
# -*- coding: utf-8 -*-
import sys
import re
import time

def print_help():
  print 'Usage: '
  print ' python mem.py 100MB'
  print ' python mem.py 1GB'

if __name__ == "__main__":
  if len(sys.argv) == 2:
    pattern = re.compile('^(\d*)([M|G]B)$')
    match = pattern.match(sys.argv[1].upper())
    if match:
      num = int(match.group(1))
      unit = match.group(2)
      if unit == 'MB':
        s = ' ' * (num * 1024 * 1024)
      else:
        s = ' ' * (num * 1024 * 1024 * 1024)

      time.sleep(10000)
    else:
      print_help()
  else:
    print_help()

python mem.py 100M
python mem.py 1G